The INA145 is a precision, unity-gain difference amplifier consisting of a precision op amp and on-chip precision resistor network. Two external resistors set the gain from 1V/V to 1000V/V. The input common-mode voltage range extends beyond the positive and negative rails. On-chip precision resistors are laser-trimmed to achieve accurate gain and high common-mode rejection. Excellent TCR tracking of these resistors assures continued high precision over temperature. The INA145 is available in the SO-8 surface-mount package specified for the extended industrial temperature range, -40°C to +85°C.
The INA145 is a precision, unity‑gain difference amplifier that uses an on‑chip resistor network and external resistors to set gain from 1 V/V to 1000 V/V. It offers low offset voltage, high common‑mode rejection (86 dB), and operates over a wide supply range.
Typical applications include current‑shunt measurements, sensor amplification, differential line receivers, and battery‑powered systems. The device is supplied in an SO‑8 package and is rated for industrial temperature ranges (‑40 °C to +85 °C).
| Supply voltage (single) | 4.5 V to 36 V |
|---|---|
| Supply voltage (dual) | +2.25 V to +18 V |
| Quiescent current | 570 µA |
| Gain range | 1 V/V to 1000 V/V |
| CMRR | 86 dB |
| Small‑signal bandwidth (G=1) | 500 kHz |
| Short‑circuit output current | 15 mA (continuous) |
| Package | SO‑8 |
The gain can be set from 1 V/V to 1000 V/V using external resistors.
The typical quiescent current is 570 µA.
It operates from a single supply of 4.5 V to 36 V or dual supplies of +2.25 V to +18 V.
The device is available in an SO‑8 surface‑mount package.